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What is touch screen ?
作者:Feng Wei 来源:原创 阅读:2002 时间:2016-05-11 字体:[  ]

 

A touch screen is a computer display screen that is also an input device. The screens are sensitive to pressure; a user interacts with the computer by touching pictures or words on the screen.
 
Touchscreens are common in devices such as game consolespersonal computerstablet computerselectronic voting machines, and smartphones.
 
Here types of touch screen technology:
 
  • Resistive: A resistive touch screen panel is coated with a thin metallic electrically conductive and resistive layer that causes a change in the electrical current which is registered as a touch event and sent to the controller for processing. Resistive touch screen panels are generally more affordable but offer only 75% clarity and the layer can be damaged by sharp objects. Resistive touch screen panels are not affected by outside elements such as dust or water.
  • Resistive touchscreens typically have high resolution (4096 x 4096 DPI or higher), providing accurate touch control. Because the touchscreen responds to pressure on its surface, contact can be made with a finger or any other pointing device.
     

     

  • Capacitive: A capacitive touch screen panel is coated with a material that stores electrical charges. When the panel is touched, a small amount of charge is drawn to the point of contact. Circuits located at each corner of the panel measure the charge and send the information to the controller for processing. Capacitive touch screen panels must be touched with a finger unlike resistive and surface wave panels that can use fingers and touch pen ,  Capacitive touch screens are not affected by outside elements and have high clarity.
  •  Writen by : Feng Wei , Muti-touch technology Co.,Ltd

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